Use cache update instead of put for encryption version

Saves a call to fetch the file id which didn't even work for a reason.

This fix properly sets the version in the database.

apps/encryption/lib/keymanager.php

@@ -441,7 +441,7 @@ class KeyManager {
 
 		if($fileInfo !== false) {
 			$cache = $fileInfo->getStorage()->getCache();
-			$cache->put($path, ['fileid' => $fileInfo->getId(), 'encrypted' => $version, 'encryptedVersion' => $version]);
+			$cache->update($fileInfo->getId(), ['encrypted' => $version, 'encryptedVersion' => $version]);
 		}
 	}